Improvement in lithographic printing-machines



3 Shets-Sheet 2.

V J. KRAYER. V Lithographic-Printing Machine.

Patented June 3,1879.

WITNESSES XNVENTOR I BY ATTORNEYS.

N4 PETERS. PHOTO-LITHOGRAPHER, WASHINGTON, D C.

3 Sheets-Sheet 3.

J. KRAYER Lithographic-PrintingMachine, No. 216,193. Patented lun 3,1879;

NYPEIERS, PHOTD-LITHOGRAFHER. wAsmNGruN. D C.

UNITED STATES PATENT OFFICE.

JOSEPH KRAYER, OF J OHANNISBERG-ON-THE-RHINE, WIESBADEN, GERMANY.

IMPROVEMENT IN LITHOGRAPHIC PRINTING-MACHINES.

Specification forming part of Letters Patent No. 216,193, dated J nne 3, 1879; application filed October 10, 1878.

To all whom it may concern:

Be it known that I, JOSEPH KRAYER, of Johannisberg-on-the-Rhine, Wiesbaden, Germany,have invented new and useful Improvements in Lithographic Printing-Machines, of which the following is a specification.

The invention will first be described in connection with the drawings, and then pointed out in the claims.

In the accompanying drawings, Figure l is a plan view of the cylinder and frame of a lithographic press having my improvements applied thereto. Fig. 2 is a section plan at one end of the cylinder on the line a 2. Fig. 3 is a side elevation with the side frame removed on line no a. Fig. 4 is a cross-section of the cylinder and paper-regulating devices, taken on line 3 y. Fig. 5 is a detail view, separately referred to; and Fig. 6 is a side elevation of a press, showing the connection of my'improvements with the other parts of the press.

Similar letters of reference indicate corresponding parts.

The cylinder at and frame b are of usual construction. The press to which my improvements are applied is of'the class in which the stone is carried by a reciprocating carriage. The press and its operating mechanism are represented in Fig. 6, and the application of my improvements to the same will be understood from the following description.

0 0 c c are the gripers carried by a rockshaft, d, that is within a cavity, a, cut across the face of cylinder a, and journaled in the plates 6 at the ends of the cavity. One end of shaft d extends outside plate 6, and is provided with a crank-arm, d, and friction-roller, 1 (See Fig. l.) The'gripers c are kept in contact with cylinder a by a spring, d attached to arm 01 and cylinder at.

f is a second rock-shaft within the cavity c carrying the pointspur 9, (see Figs. 1 and 4,) and it has at one end the crank-arm f and friction-roller f. (See Fig. 3.)

h h are the guides against'which the edge of the sheet is to be placed. t i are the planishers, which rest upon the paper that is on the cylinder at, to prevent the formation of creases andfolds. The guides h are upon a rod,h

that is held loosely in the sockets k held in frame I), so that these guides fall by their own weight below the surface of cylinder a, their downward motion being limited by a pin, h that rests on shaft d. The planishers i are attached to a bar, i, that is also fitted loosely in the sockets h so that the planishers rest by their own weight on the paper or cylinder.

70 is a shaft mounted in an extension of frame b, in front of cylinder at. Z l are canidisks upon the shaft 70, for operating the gripers 0 through the medium of the elbow-lever m. Oam lhas but one notch or depression, while i has two notches, so ,that by one cam the gripers will be operated once during a revolution of shaft k, and by the other cam they will be lifted twice. The manner of shifting the cams will he hereinafter described.

The an gle-lever m is fulcrulned on frame a. Its short arm carries a friction-roller that rests against the under side of cams l l, and its long arm is brought by the cams into contact with the roller at on arm 01 of griper-shaft d. n n are cam-disks on shaft It, which act, through the medium of elbow-lever 0, to lift the planishers i and then permit them to fall.

The cam it acts once during the revolution of a stud on bar'ito turn the same in the sockets h and raise the planishers.

p is a pin projecting downward from the lever 0, and coming in contact with a projection, 0 from the rod it, that carries the guides 71., so that when the roller 0 falls into one of the notches of cams a n the guides h h are thrown up.

q is a cam-disk on shaft 70 for operating the point-spur 9 through the medium of a lever, a, that is hung on the cross-bar r. The lever r carries a friction-roller, r that is kept incontact with cam g by a spring, q. The cam q is double, one portion of its surface having diametrically-opposed depressions, and the other portion but one depressing, so that by shifting cam q on shaft 70 the roller 0, and through it the point g, are given a multiple action during a revolution of shaft k, or the lever i may be entirely freed from contact with cam q.

The lever 0' acts upon the roller of crank f to raise spur 9 above the surface of cylinder a and cause it to pierce the sheet, and the spur is pressed down again bya -spring,: g as soon as the roller r falls into the depressions in cam q.

The spur g is also caused to pierce a hole in the sheet after it has been seized by the gripers c and carried a short-distance by means of the blocks, that is fitted to swing upon the bar T and thereby be moved in or out of the path of roller f This block sis held in either position by a clamping-screw, which passes through a slot, 8, in block s.

The shaft k is to be revolved continuously by bevel-gearing M, as shown in Fig. 6. The stoppage of cylinder a, when but one impression is to be taken during a movement to and fro-of the carriage, is effected by the devices shown in Fig.3.

t is a forked catch-lever hung at 25 -011 frame I), the upper end of which engages witha pin, 13 on cylinder to. Its lower end carries a crankpin, a, which engages with the connecting-rod u. v is an arm hung at v and formed with a mortise, v beneath the lower end-of lever t,

revolution of shaft 70.

The cams l, n, and w are shifted simultane ously to render the action of the devices described singleor double during the revolution of shaft 70 by means of screw, a fitted in frame b and working in a projection, M, from a red, I), to move the rod b endwise in its bearings in frame I), which endwise motion, by means of forks ehthat enter grooves formed in the hubs of cams l and 20, moves the said cams upon shaft 70. The-cam l is connected by rods 6 witlrcam "n, so that they move together, and the screw c is provided with a handle, a by which it is-operated.

When the cam l is in contact with 1 and cam 12 with al the guides h, planishers t, and gripers 0 will operate but once during the revolution of shaft 10, the single-acting cams being then theoperative ones. This single action is used when but one impression is to be taken during a double movement of the carriage. The cam w will be in position at this timetostop the cylinder a, as before described.

The separation of the-cams by the screw at, as before described, permits the double-acting cams 1 -10 to operate, and moves cam 10 out of action.

The moistening devices will be next described. The shaft to, journaled in frame I),

carries a cam, I), and gear-pinion c, which and once to every eight revolutions of the shaft 0. g is a lever hung at hi, andearrying a roller, 1', that rests on cam b. k is a second lever connected to g by a link, Z, and carrying a roller, m, that rests on a portion of the three-partcam n on shaft 0 o is a rod connecting lever g with one of the levers 19 that are on a rock-shaft, q, and carry-the roll 0"". s is a roller that is in contact with a roller, t, which latter turns in a vessehu, for

containing water. The rollers r and 8 should be covered with cloth or felt to carry the wa ter from roller 25 to roller 8 and by the roller 1 to the moistening table and rolls. (Not shown.)

The amount of pressure of roller 1" upon roller 8 is regulated by the screws at, which are on the outer ends of levers p and take against the frame I). The cam n is capable of sidewise motion on its shaft, and is caused to turn therewith by a feather on the shaft. The cam n can be moved on its shaft bya pin and fork, 10 so as to bring the roller m upon any one of the three disks of the cam or relieveit entirely from contact with a, in which latter case the motion of roller 0* will be given solely by cam b on shaft a". This'cam b is shaped so that it operates the roll 1' once during the revolution of a, and consequently the roll 1" will be moved once duringv each reciprocation of the stone. On the other hand, if the cam 12 be positioned so that the roller m rests upon the disk of cam n, containingfournotches, the roll 1 will be operated every second reciprocation, and if upon the disk containing two notches, every fourth reciprocation. The pin to is to be clamped to retain the cam n in place by a thumb-screw.

Having thus described my invention, I claim as new and desire to secure by Letters .Pat-

ent

1. The combination, with shaft (1, having gripers and arm d, of the lever m, the laterallyadjustable cam I, having one notch, and the fixed cam l, having two notches, as shown and described, for the purpose set forth.

2. The mechanism for operating the planishers t and guides h, consisting of theeams n a, lever 0, bar 71, pin 1), projection 0 and rod h, combined and arranged substantially as described.

3. The combination, with the gripers, guides, planishers, and lever 12, of the shaft 7t and fixed cams l and a the movable cams 1,01, and w, rod 12 forks c and screw a arranged for operation substantially as described, and for the purposes set forth.

4. In combination with the shaft a, cam b, and arm 9 by which the moistening-roll r is operated at each revolution of shaft a, the three-part cam n, arm 70, link l ,and pin and fork wi, substantially as'and for the purposes described.

J OS. KRAYER.

Witnesses:

AUG. DrEsTERwEG, JOS. KLEIN. 

